Loudspeaker



FIG. 1 is a rear perspective view of a loudspeaker showing my new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a front perspective view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a front view thereof. 

I claim the ornamental design for a loudspeaker, substantially as shown and described. 